Suction-pump for cleaning systems.



PATENTED NOV. 26. 1907.

J. V. O. PALM. SUCTION PUMP FOR CLEANING SYSTEMS.

APPLICATION FILED DEO.26,1906.

was NORRIS PETERS co, wasnmcrcrv, n. c.

JOHN V. O. PALM, OF MILWAUKEE, WISCONSIN.

SUCTION-PUMP FOR CLEANING SYSTEMS.

Specification of Letters Patent.

Patented Nov. 26, 1907'.

Application filed December 26. 1906. Serial No. 349.420.

T 0 all whom it may concern:

Be it known that I, JOHN V. O. PALM, residing in Milwaukee, in the county of M ilwaukee and State of Wisconsin, have invented new and useful Impipvements in Suction Pumps for Cleaning Systems, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

This invention has for its object to provide a suction pump for cleaning systems in which mechanical pistons tightly fitting in cooperating cylinders are dispensed with by the substitution of liquid plungers caused to rise and fall and thus produce the desired pumping operation by the displacement thereof by means of a reciprocated plunger loosely fitting in the receptacle containing the liquid.

Another object of this invention is to so locate the valves of a suction pump of the liquid piston type that they will be protected from interference in their operation by the liquid.

Another object of this invention is to improve upon general details of construction in a liquid piston suction pump.

lVith the above and other objects in view the invention consists in the liquid piston suction pump herein claimed, its parts and combinations of parts and all equivalents.

Referring to the accompanying drawings in which like characters of reference indicate the same parts in the different views Figure 1 is a sectional elevation of a liquid piston suction pump constructed in accordance with this invention; and, Fig. 2 is a sectional view of one of the valves thereof.

In Fig. 1 of the drawings are shown a pair of pumps suitably connected together for cooperation, the pumps being identical in construction requiring description of only one of them. In each pump, 5 represents a casing which is preferably in the form of a cylindrical vessel with double side walls, the cylindrical shell 6 forming the inner wall thereof being spaced from the outer wall and terminating at a distance from the bottom of the casing, while its upper end is connected by means of a top web 7 with the outer wall so as to form an annular air dome within the double walls when the casing is partially filled with a liquid 8, such as water. WVithin the inner cylindrical wall 6 and entirely free from engagement therewith is a cylindrical plunger 9 whose bottom is closed and contains a weight 10, the upper end of the plunger being open. A connecting rod 11 is pivotally connected to the bottom of the plunger and also pivotally connects with a walking beam 12, which is suitably mounted and caused to oscillate by any desirable motor, not shown, to lift and lower the plunger-s 2') of the two pumps alternately, the phmger of one pump being at its highest position when the plunger of the other pump is at its lowest position. An inlet valve 13 and an outlet valve 14 are connected with the casing at the upper end of the annular air dome thereof, and for convenience the inlet valves of both pumps are connected by means of a common suction pipe 15,

while the outlet valves thereof are connected by a common discharge pipe 16.

In operation when the plunger is at its lower position, as at the right in Fig. 1, the liquid 8 is displaced. thereby to such an extent as to cause it to rise in the open inner chamber and the annular air dome, so as to force the air from-the air dome out through the outlet check valve 14, the level of the liquid in the open inner chamber and the air dome being nearly the same since there is very little or no resistance to the outflow of air from the air dome. However, when the plunger rises to its upper position, as at the left of Fig. 1, the liquid in the inner chamber and the air dome falls, since it is no longer displaced by the plunger, and sucks air into the air dome through the inlet valve 13 from the suction pipe 15, the water level in the inner chamber being lower than the water level in the air dome according to'the degree of suction produced. The difference in liquid level at such time indicates the degree of vacuum or suction being produced in the suction pipe. This difference is never so great as to result in the water in the inner chamber lowering to an extent which will permit air to enter the air dome beneath the lower edge of the cylindrical wall 6. In event of a suction which holds the liquid in the air dome at practically its highest level, the liquid in the inner chamber is still at a level which is higher than the lower edge of the inner wall 6 of the casing. Furthermore, the plunger 9 being located in the inner chamber, away from the liquid in the air dome, is incapable of splashing the liquid in such a manner as to cause it to interfere with the inlet and outlet valves, a feature of great importance in mechanism of this character. The particular form of valve designed for this use and forming a part of this invention, as shown in detail in Fig. 2, comprises a hollow rubber ball 17 seated on a rounded ring 18 of aluminium which fits in a partition 19 between an upper chamber and a lower chamber of a casing 20, these chambers having openings 21 to communicate with the parts With which the valve is connected. The top of the upper chamber of the casing is provided with an opening through which the ball valve or its seat may be placed in position and this opening has a cover 22 held in place by a clamping member 23 which has a hook 24 on one end engaging a hook 25 on the casing 20 and a lug 26 bearing on the top of the cover 22, while a hand screw 27 is mounted in its other end and passes between a pair of ears 28 on the cover and threads into the casing 20 to tightly clamp the cover in place upon a gasket 29 of suitable material. The

cover 22 is provided with a depending lug 30 for limiting the movement of the ball valve 17 from its seat, With inlet and outlet check valves of this construction the valve is very sensitive to the air pressure tending to open it and it is very tightly closed by the air pressure tending to pass back thereby, the aluminium valve seat preventing the rubber valve sticking and being easily removable for cleaning, the construction of the cover with its clamping means facilitating this operation. Any other material may be used in the construction of the valve seat which will not be affected by the sulfur in the rubber of the ball valve.

What I claim as my invention is;

1. A liquid piston suction pump, comprising a casing containing a liquid and forming an air dome, means free from the casing to be dipped'into the liquid for displacing the liquid and causing it to move in the air dome, and valves controlling the inlet and outlet of air to the air dome.

2. A liquid piston suction pump, comprising a casing containing a liquid and forming an air dome, means free from the casing adapted to be forcibly dipped into the liquid outside of the air dome for displacing the liquid and causing it to move in the air dome, and valves for controlling the inlet and outlet of air to the air dome.

3. A liquid piston suction pump, comprising a casing having a double wall forming an air dome therebetween opening into the interior space and containing liquid, a plunger free from the casing adapted to be forced downwardly or dipped into the liquid in the interior space to displace the liquid and cause it to rise in the air dome, and valves for controlling the inlet and outlet of air to the air dome.

4. A liquid piston suction pump, comprising a cylindrical casing having double Walls forming an air dome around a central open chamber with communication between the lower end of the air dome and the central chamber, there being a liquid contained in the casing, a plunger operating in the central chamber without fitting therewith and adapted to be dipped into the liquid and reciprocated therein to repeatedly displace the liquid and cause it to reciprocate in the air dome, and valves for controlling the inlet and outlet of air to the air dome. v

In testimony whereof, I affix my signature, in presence of two witnesses.

JOHN V. O. PALM. Witnesses:

R. S. O. CALDWELL, ANNA F. SOHMIDTBAUER. 

